This fad may be here to stay: The Wi-Fi Alliance and In-Stat co-released the detail that over 100 million Wi-Fi chipsets were shipped already this year, with an estimate of 120 million by year's end.
Given that the share of laptops sold worldwide for 2005 is estimated at over 100 million units, and that a large majority of those are now sold with Wi-Fi, that accounts for a big hunk of it. Another large hunk are home gateways, selling in the tens of millions each year. The rest? Adapters, chips in handhelds, and newer Wi-Fi appliances.